Mil 



of a little bowl of a spoon; that of 2nc] pair rather strong and distinctly 3-ar- 

 ticnlate, terminal joint knife-shaped and denticulate inside. Uropoda with the 

 outer ramus about twice the length of the basal part, inner ramus somewhat 

 narrower, but scarcely shorter. Colour of dorsal face in life of a clear minium- 

 rose. Length of adult male 5 mm. 



Remarks. — This species, first described by Koch, is easily distinguished by 

 its comparatively broad and flattened body, the dorsal face of which is densely 

 granular, and by its beautiful colour, which, however, is only seen in fresh 

 specimens. The structure, in the male, of the last pair of legs, and of the inner 

 ramus of the 2 anterior pairs of pleopoda is rather peculiar, and has been well 

 described by Dr. M. Weber. - 



Occurrence. — The occurrence of this species in Norway has, it is true, 

 not yet been demonstrated; but, as it is not uncommonly found in Denmark, I am 

 much disposed to believe, that, on a closer investigation, it will also prove to 

 belong to the fauna of Norway. The figures here given are from specimens kindly 

 sent to me from the Museum of Copenhagen. According to Mr. Budde-Lund, it 

 is chiefly found in garden hot-houses. 



Distribution. — Denmark, Germany, Holland, Britain, France, Spain, Italy, 

 Dalmatia, Algeria. 



Gen. 2. TriChOniSCOideS, G. O. Sars, n. 



Generic Characters. — Body narrow, oblong, rather convex, with very soft 

 integuments, and the lateral parts of the segments but slightly expanded. Meta- 

 some abruptly contracted, with the last segment about as in Irichoniscus. Eyes 

 simple or wholly wanting. Antennulse and antennae of a similar structure to that 

 in Trichonisciip. Left mandible with 3, right with 2 penicils behind the cutting 

 part. Maxillipeds resemhling in structure those in Trichoniscus, but comparatively 

 less produced, with the masticatory lobe much shorter than the terminal part and 

 having the apical lash smaller. Legs comparatively short and thick, but very 

 slightly increasing in length posteriorly. 1st pair of pleopoda in male with both 

 plates peculiarly modified, the inner one being the smaller; 2nd pair with the 

 inner ramus strongly produced, Inarticulate, terminal joint subfoliaceous, contorted. 

 Uropoda with the inner ramus terminating in a single slender spine. 



Remarks. — I have felt justified in established this new genus to include 

 some species formerly referred to the genus Trichoniscus, but differing in certain 



